Krishnagar, March 31: Two CPM leaders were seriously injured when Congress supporters beat them up in the block office in Shantipur, Nadia. The Congresss Kartick Adhikary brought 150 supporters and demanded their names be included in the below-poverty-line list. Panchayat chief Sushil Sil and panchayat samiti member Subhas Basak were attacked after they protested.